The average weight of a feather is - .00125 pounds.
As light as a feather.
The answer depends on the bird and also what type of feather.
About 5 miligram
an average feather weighs about .4677790. --.4677790 what? Needs a unit of measurement!
69oz
150
The habitat of a feather star is the ocean.
less than a feather in ancient Egypt beliefs
None. A millimetre is a measure of length; weight would be measured in millinewtons.
one step below a light weight Immeasurable with any home scales.
450